package com.zzyl.common.utils;

import cn.hutool.http.HttpUtil;
import cn.hutool.json.JSONObject;
import cn.hutool.json.JSONUtil;
import com.zzyl.common.exception.base.BaseException;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

import java.util.HashMap;
import java.util.Map;
import java.util.Objects;

/**
 * @author liuyp
 * @since 2025/8/17
 */
@Component
public class WechatUtil {
    private static final String OPENID_URL = "https://api.weixin.qq.com/sns/jscode2session";
    private static final String PHONE_URL = "https://api.weixin.qq.com/wxa/business/getuserphonenumber?access_token=";
    private static final String TOKEN_URL = "https://api.weixin.qq.com/cgi-bin/token";

    @Value("${wechat.appid}")
    private String appid;
    @Value("${wechat.secret}")
    private String secret;

    public String getOpenid(String code){
        //准备请求参数
        Map<String, Object> params = new HashMap<>();
        params.put("appid", appid);
        params.put("secret", secret);
        params.put("js_code", code);
        params.put("grant_type", "authorization_code");

        //向微信平台API接口发请求，拿code换取openid
        String result = HttpUtil.get(OPENID_URL, params);

        //解析结果
        JSONObject jsonResult = JSONUtil.parseObj(result);
        if (Objects.nonNull(jsonResult.getInt("errcode"))) {
            throw new BaseException(jsonResult.getStr("errmsg"));
        }

        return jsonResult.getStr("openid");
    }

    public String getPhone(String phoneCode){
        //准备请求参数
        Map<String, Object> params = new HashMap<>();
        params.put("code", phoneCode);

        //向微信平台API发请求，拿phoneCode换取手机号
        String result = HttpUtil.post(PHONE_URL + getToken(), JSONUtil.toJsonStr(params));

        //解析结果
        JSONObject jsonResult = JSONUtil.parseObj(result);
        if (jsonResult.getInt("errcode") != 0) {
            throw new BaseException(jsonResult.getStr("errmsg"));
        }

        //获取手机号
        return jsonResult.getJSONObject("phone_info").getStr("phoneNumber");
    }

    public String getToken() {
        //准备参数
        Map<String, Object> params = new HashMap<>();
        params.put("grant_type", "client_credential");
        params.put("appid", appid);
        params.put("secret", secret);

        //向微信平台发请求，获取微信平台的token
        String result = HttpUtil.get(TOKEN_URL, params);

        //解析结果
        JSONObject jsonResult = JSONUtil.parseObj(result);

        return jsonResult.getStr("access_token");
    }
}